All built as reusable tools and components that are easy to integrate with your systems, data stores, relational and NoSQL databases, etc.

### Dependency Injection { #dependency-injection }

FastAPI includes an extremely easy to use, but extremely powerful <abbr title='also known as "components", "resources", "services", "providers"'><strong>Dependency Injection</strong></abbr> system.

Dieses Beispiel ist jedoch immer noch gültig und zeigt, wie mit den internen Komponenten interagiert wird.

///

Wir können denselben Ansatz auch verwenden, um in einem Exceptionhandler auf den Requestbody zuzugreifen.

import org.codehaus.plexus.util.xml.Xpp3Dom;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * JDK toolchain factory.
 * This is a <code>ToolchainFactory</code> Plexus component registered with
 * <code>jdk</code> hint.
 *
 * @since 2.0.9, renamed from <code>DefaultJavaToolchainFactory</code> in 3.2.4
 * @deprecated Use {@link org.apache.maven.api.services.ToolchainFactory} instead.
 */

 * processing the response, and extracting child URLs.
 *
 * <p>
 * This class implements the {@link Runnable} interface, allowing it to be executed in a separate thread.
 * It uses various services and components, such as {@link UrlQueueService}, {@link DataService},
 * {@link CrawlerContainer}, {@link LogHelper}, {@link CrawlerClientFactory}, and {@link CrawlerContext},
 * to perform its tasks.
 * </p>
 *
 * <p>

import org.apache.maven.project.artifact.DefaultMetadataSource;
import org.apache.maven.repository.legacy.LegacyRepositorySystem;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.composition.CycleDetectedInComponentGraphException;
import org.codehaus.plexus.testing.PlexusTest;
import org.eclipse.aether.DefaultRepositorySystemSession;
import org.eclipse.aether.internal.impl.DefaultChecksumPolicyProvider;

* How to set **validation constraints** as `maximum_length` or `regex`.
* A very powerful and easy to use **<abbr title="also known as components, resources, providers, services, injectables">Dependency Injection</abbr>** system.
* Security and authentication, including support for **OAuth2** with **JWT tokens** and **HTTP Basic** auth.

Mas esse exemplo ainda é valido e mostra como interagir com os componentes internos.

///

Também podemos usar essa mesma abordagem para acessar o corpo da requisição em um manipulador de exceção.

Tudo que precisamos fazer é manipular a requisição dentro de um bloco `try`/`except`:

import org.apache.maven.api.annotations.Nullable;
import org.apache.maven.api.annotations.Provider;
import org.apache.maven.api.annotations.ThreadSafe;

/**
 * A container for data that is specific to a session.
 * All components may use this storage to associate arbitrary data with a session.
 * <p>
 * Unlike a cache, this session data is not subject to purging. For this same reason, session data should also not be

import org.apache.maven.profiles.activation.ProfileActivationException;
import org.codehaus.plexus.MutablePlexusContainer;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
import org.codehaus.plexus.logging.Logger;

/**
 * DefaultProfileManager
 */
@Deprecated
public class DefaultProfileManager implements ProfileManager {

import org.codelibs.fess.suggest.util.SuggestUtil;
import org.opensearch.transport.client.Client;

/**
 * Builder class for creating instances of {@link Suggester}.
 * This class allows for the configuration of various components used by the {@link Suggester}.
 */
public class SuggesterBuilder {
    /**
     * Constructs a new {@link SuggesterBuilder}.
     */
    public SuggesterBuilder() {
        // nothing
    }